The architectural firm of Skidmore, Owings, & Merrill was commissioned to design the headquarters. The job was given to the firm's principal New York designer, Gordon Bunshaft, who was a devotee of the International Style. The design of the building was not coincidental; the corporate heads of Lever wanted a design that suggested cleanliness. Thus, the building's sparkling green-tinted glass and clean lines.
The innovative building was designed as a slab with its narrow edge facing the street. The building is completely sealed without functioning windows, which allows less dirt from the streets to get into the building than traditional construction. The glass that makes up the building's facade was also heat-resistant, reducing the costs of heating the building. At the time of its construction, Lever House was the only glass-walled structure along Park Avenue.
The building attracted immediate attention at its completion. Much of the press surrounding the Lever building was positive, noting its innovative design. Some observers correctly noted that the building would likely mark the beginning of a new architectural age. Not everyone praised the new building, however. Tucked among the traditional masonry structures, the new building was too much of a departure to suit everyone. Frank Lloyd Wright was among the most vocal of the building's critics.
Over the years, some of the original green-tinted glass has had to be replaced and some of the replacement panels are of a different shade, giving the building a patchwork look. But as its designers intended, it retains its squeaky clean appearance. The building underwent an extensive renovation in 1998. It is a New York City Landmark and is also listed on the National Register of Historic Places.